212 citations · 1.8k across the 34 of their papers we have counts for
29 papers · 1 filter
Wave Functions of the Proton Ground State in the Presence of a Uniform Background Magnetic Field in Lattice QCD
Dale S. Roberts, Patrick O. Bowman, Waseem Kamleh +1
We calculate the probability distributions of quarks in the ground state of the proton, and how they are affected in the presence of a constant background magnetic field. We focus…
Role of center vortices in chiral symmetry breaking in SU(3) gauge theory
Patrick O. Bowman, Kurt Langfeld, Derek B. Leinweber +3
We study the behavior of the AsqTad quark propagator in Landau gauge on SU(3) Yang-Mills gauge configurations under the removal of center vortices. In SU(2) gauge theory, center vo…
Impact of stout-link smearing in lattice fermion actions
Peter J. Moran, Patrick O. Bowman, Derek B. Leinweber +2
The impact of stout-link smearing in lattice fermion actions is examined through the consideration of the mass and renormalization functions of the overlap quark propagator over a…
Stout-link smearing in lattice fermion actions
J. B. Zhang, Peter J. Moran, Patrick O. Bowman +2
The properties of the momentum space quark propagator in Landau gauge are studied for the overlap quark action in quenched lattice QCD. Numerical calculations are performed over fo…
Center vortices and the quark propagator in SU(2) gauge theory
Patrick O. Bowman, Kurt Langfeld, Derek B. Leinweber +4
We study the behavior of the AsqTad quark propagator in Landau gauge on quenched SU(2) gauge configurations under the removal of center vortices. In contrast to recent results in S…
Unquenching effects in the quark and gluon propagator
Waseem Kamleh, Patrick O. Bowman, Derek B. Leinweber +2
In this work we examine the Fat-Link Irrelevant Clover (FLIC) overlap quark propagator and the gluon propagator on both dynamical and quenched lattices. The tadpole-improved Lusche…
Scaling behavior and positivity violation of the gluon propagator in full QCD
Patrick O. Bowman, Urs M. Heller, Derek B. Leinweber +5
The Landau-gauge gluon propagator is studied using the coarse and fine dynamical MILC configurations. The effects of dynamical quarks are clearly visible and lead to a reduction of…
Effects of dynamical sea-quarks on quark and gluon propagators
Maria B. Parappilly, Patrick O. Bowman, Urs M. Heller +3
We present an unquenched calculation of the quark propagator in Landau gauge with 2+1 flavors of dynamical quarks. We study the scaling behavior of the quark propagator in full QCD…
Scaling behavior of quark propagator in full QCD
Maria B. Parappilly, Patrick O. Bowman, Urs M. Heller +3
We study the scaling behavior of the quark propagator on two lattices with similar physical volume in Landau gauge with 2+1 flavors of dynamical quarks in order to test whether we…
Unquenched quark propagator in Landau gauge
Patrick O. Bowman, Urs M. Heller, Derek B. Leinweber +3
We present an unquenched calculation of the quark propagator in Landau gauge with 2+1 flavors of dynamical quarks. We use configurations generated with an improved staggered (``Asq…
The FLIC Overlap Quark Propagator
Waseem Kamleh, Patrick O. Bowman, Derek B. Leinweber +2
FLIC overlap fermions are a variant of the standard (Wilson) overlap action, with the FLIC (Fat Link Irrelevant Clover) action as the overlap kernel rather than the Wilson action.…
Quark propagator in Landau and Laplacian gauges with overlap fermions
J. B. Zhang, Patrick O. Bowman, Ryan J. Coad +3
The properties of the momentum space quark propagator in Landau gauge and Gribov copy free Laplacian gauge are studied for the overlap quark action in quenched lattice QCD. Numeric…
Quark-gluon vertex in arbitrary kinematics
Jon-Ivar Skullerud, Patrick O. Bowman, Ayse Kizilersu +2
We compute the quark-gluon vertex in quenched lattice QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The complete vertex is computed in two sp…
Unquenched Gluon Propagator in Landau Gauge
Patrick O. Bowman, Urs M. Heller, Derek B. Leinweber +2
Using lattice quantum chromodynamics (QCD) we perform an unquenched calculation of the gluon propagator in Landau gauge. We use configurations generated with the AsqTad quark actio…
Infrared and ultraviolet properties of the Landau gauge quark propagator
Patrick O. Bowman, Urs M. Heller, Derek B. Leinweber +2
We present a current summary of a program to study the quark propagator using lattice QCD. We use the Overlap and ``Asqtad'' quark actions on a number of lattice ensembles to asses…
Scaling Behavior of the Landau Gauge Overlap Quark Propagator
J. B. Zhang, F. D. R. Bonnet, P. O. Bowman +2
The properties of the momentum space quark propagator in Landau gauge are examined for the overlap quark action in quenched lattice QCD. Numerical calculations are done on three la…
Scaling behavior of the overlap quark propagator in Landau gauge
J. B. Zhang, Frederic D. R. Bonnet, Patrick O. Bowman +2
The properties of the momentum space quark propagator in Landau gauge are examined for the overlap quark action in quenched lattice QCD. Numerical calculations are done on three la…
The nonperturbative quark-gluon vertex
Jonivar Skullerud, Patrick Bowman, Ayse Kizilersu
We show results for the quark-gluon vertex in the Landau gauge, using a mean-field improved Sheikholeslami-Wohlert fermion action. We compute all the three non-zero form factors of…
Modelling the quark propagator
P. O. Bowman, U. M. Heller, D. B. Leinweber +1
The quark propagator is at the core of lattice hadron spectrum calculations as well as studies in other nonperturbative schemes. We investigate the quark propagator with an improve…
Towards the Continuum Limit of the Overlap Quark Propagator in Landau Gauge
J. B. Zhang, F. D. R. Bonnet, P. O. Bowman +2
The properties of the momentum space quark propagator in Landau gauge are examined for the overlap quark action in quenched lattice QCD. Numerical calculations were done on two lat…
Gluon Propagator on Coarse Lattices in Laplacian Gauges
P. O. Bowman, U. M. Heller, D. B. Leinweber +1
The Laplacian gauge is a nonperturbative gauge fixing that reduces to Landau gauge in the asymptotic limit. Like Landau gauge, it respects Lorentz invariance, but it is free of Gri…
Lattice quark propagator with staggered quarks in Landau and Laplacian gauges
P. O. Bowman, U. M. Heller, A. G. Williams
We report on the lattice quark propagator using standard and improved Staggered quark actions, with the standard, Wilson gauge action. The standard Kogut-Susskind action has errors…
Overlap Quark Propagator in Landau Gauge
Frédéric D. R. Bonnet, Patrick O. Bowman, Derek B. Leinweber +2
The properties of the quark propagator in Landau gauge in quenched QCD are examined for the overlap quark action. The overlap quark action satisfies the Ginsparg-Wilson relation an…
Quark propagator from an improved staggered action in Laplacian and Landau gauges
P. O. Bowman, U. M. Heller, A. G. Williams
Studies of gauge dependent quantities are afflicted with Gribov copies, but Laplacian gauge fixing provides one possible solution to this problem. We present results for the lattic…